The MAX17681/MAX17681A is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
MAX17681/MAX17681A uses peak-current-mode control. The low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout.
The MAX17681/MAX17681A devices generate a well regulated primary side voltage which is then scaled by a suitable transformer turns ratio to derive isolated secondary output rails. While both MAX17681 and MAX17681A support primary side overcurrent protection, the MAX17681A is an enhanced design that supports robust secondary-side overcurrent protection as well.
The MAX17681/MAX17681A is available in a compact 10-pin (3mm x 2mm) TDFN package. Simulation models are available.
|Part Number||Application (VIN)||VIN |
|Topology||Switch Type||Feedback||Freq. |
|Duty Cycle |
|Oper. Temp. |
|4.5||42||Flyback||Internal||Primary Side||200||97.5||2.8||2.8||-40 to +125|| |
|See All Isolated Power Supplies (24)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C|
|System Board||6692||MAXREFDES1170: 24V/100mA, Iso-Buck DC-DC Converter Using the MAX17681A|
|System Board||6330||MAXREFDES150#: Pocket IO PLC Development Platform|
|Evaluation Board||9476||MAX17681AEVKITC Evaluation Kit MAX17681A for Isolated +15V or +12V Output Configuration|
|Evaluation Board||9475||MAX17681AEVKITD Evaluation Kit MAX17681A for Isolated +7V or +5V Output Configuration|
|Evaluation Board||9471||MAX17681AEVKITF Evaluation Kit MAX17681A for Isolated +24V Output Configuration|
|Evaluation Board||9470||MAX17681AEVKITE Evaluation Kit MAX17681A for Isolated ±15V and ±7.5V Output Configuration|
|Evaluation Board||9466||MAX17681AEVKITB Evaluation Kit MAX17681A for Isolated ±7V or ±5V Output Configuration|
|Evaluation Board||9462||MAX17681AEVKITA Evaluation Kit MAX17681A for Isolated ±15V or ±12V Output Configuration|
|Evaluation Board||9053||MAX17681EVKITE Evaluation Kit for MAX17681 Isolated ±15V and ±7.5V Output Configuration|
|Evaluation Board||9028||MAX17681EVKITB Evaluation Kit for the MAX17681 Isolated ±7V or ±5V Output Configuration|
|Evaluation Board||9022||MAX17681EVKITF Evaluation Kit for the MAX17681 Isolated +24V Output Configuration|
|Evaluation Board||9021||MAX17681EVKITD Evaluation Kit for the MAX17681 Isolated +7V or +5V Output Configuration|
|Evaluation Board||9020||MAX17681EVKITC Evaluation Kit for the MAX17681 Isolated +15V or +12V Output Configuration|
|Evaluation Board||8751||MAX17681EVKIT Evaluation Kit for MAX17681 Isolated ±15V or ±12V Output Configuration|